Apparatus foe feeding sawdust to furnaces



*fiar SAMUEL KENNEDY, OF HIBBE'IS, OHIO.

APPARATUS FOR FEEDING SAV/'DUST TO FURNACES.

Specification of Letters Patent No. 29,794, dated August 28, 186,0.

To all whom 'it may concern.'

Be it known that I, SAMUEL KENNEDY, of I-Iibbets, in the county of Carroll and State of Ohio, have invented a new and Improved Apparatus or Device for Feeding' Sawdust to Furnaces; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making part of this specication, in which- Figure l is a side sectional view of my invention applied to its work. Fig. 2 a horizontal section of the same taken in the line Fig. l.

Similarletters of reference indicate corresponding parts in the two figures.

The object of t-his invention is to obtain a device for feeding saw-dust to the furnace direct from the saw and to distribute the saw-dust in the furnace in the most favorable way to insure a perfect combustion of the former.

The invention is designed to be applied to the furnaces of the boilers of steam saw mills and to afford an automatic feeding device which will cause the sawdust to be consumed as fast as it is produced during the sawing operation.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A represents a cylinder which is placed in a horizontal position and has a piston or plunger B, fitted within it. The piston or plunger has a reciprocating` movement given it by means of a rod a, which is driven from a crank b, on a vertical xsh-aft C, as shown in F ig. l. The front end of the plunger B, has a series of step-like projections c, formed on it, and the front end of the cylinder communicates with the upper part of a cylindrical box D, at its center.

Through the center of the cylindrical box D, a vertical shaft E passes, and on this shaft E, and within' the box D, radial plates orvblades (Z, are attached, and fitted on a circular plate el. The ends of the plates or blades (Z, nearly'touch the inner side of the box D, and form a scatter-er D.

The box D, communicates with the furnace of a steam boiler as shown in red Fig. l, and the upper end of the shaft E, is connected with the shaft C, by means of a belt e. The lower end of shaft E, projects below box D, and is stepped upon an adjustbelow box D, that access to it may be readily f had for oiling; the location of screw J, is also intended to be below the grate so that the oil applied to the bearing of shaft E, upon said shaft J, cannot become so much heated by the fire as to be quickly evaporated.

On the cylinder A, a hopper f, is placed,

which communicates with the interior of the cylinder A.

The operation is as follows: Motion is given the shaft C, by a belt from any of the running shafts of the mill, and the saw dust -is conducted direct from the saw kerf to the hopper j', by aneans of a suitable spout. rlhe reciprocating movement of the plunger B, forces the saw dust from the cylinder A, into the box D, from which it is ejected by the rotation of the blades d, the latter throwing the saw dust into the furnace in a scattered state overthe lire insuring the rea'dy consumption of the former.

The step like projections c, at the front end of the plunger B, admit of the free entrance of the sawdust into the cylinder A, and prevent the choking or clogging of the cylinder.

If desired a reciprocating screen may be placed over the hopper f, and operated from the shaft C, the screen excluding blocks and large substances from the cylinder.

By the employment of a cylinder and plunger to convey the dust to the feeder the air is prevented from` entering the fire through the hopper f, the upper part of box D, being intended to be left covered. `When the extremity of the cylinder that pushes the dust toward the feeder passes beyond the bottom of the hopper all communication between the hopper and cylinder is cut olf and the dust within the hopper rests upon the cylinder and thus elfectually prevents the admission of air.

I do not claim the invention of rotary feeders nor the use of endless belts to convey the dust to the feeders, but

Having thus described my invention what below the boX D, and upon a screw J, which l0 I Claim as new, and desire to secure by Letalso connects the stirrup and the frame K,

ters Patent, is :d together all as set forth for the purpose 1. The eombintion of the stepped plunspecified. 5 0rer B cylinder and hopper f with the box D7, seatterer D?, and shafts (XE, as and SAMUEL KENNEDY' for the purpose herein shown and described. Witnesses:

2. The arrangement of the leaving of the JASPER H. FISHEL,

lower end of shaft E, within a stirrup L, FRANKLIN DOWNS. 

